A high maintaining the refractive index further making a molded product capable of suppressing the dimensional change and transmittance change caused by the high temperature thermal history to provide a suitable polymerizable composition that. (A) a specific 100 parts by weight of reactive silsesquioxane compound and (b) a polymerizable composition containing a specific fluorene compound 10 to 2,000 parts by mass, and curing the polymerizable composition cured objects, as well as resin lenses created by using the polymerizable composition. .BACKGROUND